Setting up a school laboratory in Kenya requires planning, especially when you have to work with limited budgets. The lab needs all the essential equipment’s to ensure that all the operations in the lab are attained without much struggle.
You need a laboratory that supports both understanding and hands-on experimentation across biology, chemistry and physics. Here is a list of laboratory equipment you should prioritize, along with reasons why you should choose each one.
In this article, we will look into some of the crucial equipments one should prioritize to ensure smooth lab operations especially in schools in Kenya.
Glasswares are the backbone of any laboratory. They include the beakers, conical flasks, test tubes and measuring cylinders which are normally used in every experiment whether it is mixing chemicals, heating substances or measuring liquids.
In Kenyan school labs, where practical exposure is key to national exams like KCSE having enough durable, well graduated and heat-resistant glassware ensures students can actively participate.
For example, prioritizing quality borosilicate and pyrex glassware minimizes many errors that may occur during the experiments and even make the final results even better. Replacement costs over time making it a cost-effective investment for long-term use.
To be specific, the school labs in Kenya should have the following, a conical flask, beakers, round bottom flasks, burette, separating funnel, test tubes, boiling tubes, evaporating dish and also the reagent bottles which are used in storage of light sensitive chemicals.
Every lab needs a source of heat to conduct a wide range of experiments especially during the chemistry and biology practical sessions. Bunsen burners are ideal where gas supply is available while spirit lamps serve as an alternative in schools without gas infrastructure.
Heating is necessary for reactions, sterilization and processes like evaporation or distillation. Prioritizing easy-to-use heat sources ensures experiments can be conducted efficiently while maintaining safety standards for students.
Examples of the source of heat that can be used in the lab that we have the stock include, the portable burner, the spirit lamp and also the Bunsen burner.
Microscopes are usually used for biology studies allowing students to observe cells, microorganisms and tissue structures. In Kenya curriculum topics such as cell biology and microbiology require hands-on observation. Investing in student-friendly microscopes helps bridge the gap between theory and practice.
A few well-maintained microscopes can serve many students through group work making them a high-impact priority in any school laboratory. We have quality student microscope, biological microscope and also the binocular microscope.
They are useful in ensuring that the small microscopic specimens are observed under the microscope. This helps identify the specimen in details so that one can come up with the results.
Safety equipment including the lab coats, gloves, goggles and also the first aid kit. This equipment is crucial in any school labs whereby they ensure the students are well protected. Essential safety gear such as lab coats, gloves and protective goggles protects students from chemical spills, burns and other hazards.
A stocked first aid kit ensures quick response in case of accidents. In Kenya, where some schools may overlook safety due to budget constraints prioritizing this equipment reduces risks. Fosters a culture of responsible scientific practice among learners.
The dust coats can also be prioritized in schools that use chalk as their writing pen. The teachers can cover their faces to ensure that they do not come in contact with the dust directly.
Accuracy is critical in experiments. Instruments like the analytical/electron balances, spring balances, thermometers and pH meters allow students to collect reliable data. These tools are essential for experiments involving mass, temperature and acidity/alkalinity and where measuring is key.
In exam settings students are often tested on their ability to take measurements so investing in dependable measuring equipment enhances both learning outcomes and performance.
No chemistry lab is complete without a supply of chemical reagents. Schools should prioritize used acids, bases, salts and indicators required for the syllabus. Examples of chemicals one should prioritize while setting a lab include the Nitric acid, Ammonia, Sulphuric acid, Hydrochloric acid, distilled water, Hydrogen peroxide and also the Bromine water.
In basic staining, one can prioritize the Giemsa stain, Malachite green, Leishmania stain, Eosin yellow and also the Methylene blue stain.
Other important chemicals include Sodium hydroxide, Aluminum oxide, Calcium oxide, Calcium carbonate, Ammonium carbonate.
Reagent bottles are important is proper storage of most chemicals in the laboratory. They ensure that the chemicals are safely placed in an environment where there is not extreme light that can decompose the chemical.
For biology practical’s, dissection kits (including the scalpels, forceps, scissors) and anatomical models are crucial. These tools help students understand the structure of organisms and organs in a hands-on way.
In our store we have variety of model options which include the brain, skin, ears teeth and also the eye model. A part from that we have skeleton models which come in 3 sizes. They are useful in learning all the parts of the human body at a glance.
In Kenya, education system practical exams often involve dissection or identification of specimens. Prioritizing these tools ensures students gain experience rather than relying solely on textbook diagrams.
A complete school lab must also cater to physics experiments. Equipment such as ammeters, voltmeters, circuit boards, lenses, prisms and pendulums enable students to explore concepts like electricity, light and motion.
These tools make abstract theories more tangible and easier to understand. Prioritizing physics apparatus allows teachers to demonstrate multiple concepts using the same equipment, maximizing value.
Buy measuring the current, electricity and also the light, all these concepts come in handy thus ensuring that the concepts are well understood while they get to be done practically.
A reliable water source is essential for cleaning equipment conducting experiments and maintaining hygiene. Installing sinks with drainage ensures smooth lab operations and prevents contamination. The sinks are usually black and made of the fibers to ensure that the sinks are durable and cannot be stained easily.
In schools, where water access can sometimes be inconsistent investing in water storage solutions alongside sinks can greatly improve laboratory functionality. Under, the water supply, the school can prioritize on quality water taps to avoid leaks and rusting. Some good examples include the Swan neck tap and the control tap, which are usually a good choice considering they are both stainless steels.
An organized lab requires study benches and adequate storage. Lab benches provide working surfaces for experiments while shelves and cabinets help keep equipment organized and accessible. Proper storage reduces damage improves efficiency and creates a learning environment. Prioritizing durable furniture ensures the lab remains functional for years.
Luckily, we have the portable lab bench which comes with a variety of features which include the lab sink, cabinet for the storage of the chemicals and other lab essentials, the water supply units, water taps, double gas taps and also a pair of PVC pipes.
Setting up a school laboratory in Kenya is not just about acquiring equipment, it is about creating an environment that supports curiosity, safety and practical learning. By prioritizing tools like glassware, microscopes, safety gear and measuring instruments schools be able to improve the results and the overall standards of the lab.
Setting up a school lab in Kenya requires careful planning and prioritization. While still on budget, you can still get most of the things done. School laboratories in Kenya should have these tools to support students, in their science education.
Purchasing laboratory supplies in Kenya requires proper planning and evaluation of many factors. These factors are key when getting lab equipment, chemicals and glassware for students, researchers, hospitals and private labs in Kenya.
The quality of lab results really depends on the materials and equipment used. It is very important to make informed decisions. The article covers all the factors to consider to help you in setting up a lab or restocking an existing one. Understanding these factors can save you time, money and potential risks.
One of the important things to think about is the quality of the lab supplies. High-quality materials (be it chemicals, glassware and also the lab equipment), make sure you get results and reduce the chances of contamination or experimental errors. In Kenya it is essential to check whether the products meet recognised standards such as ISO certification.
If you buy poor-quality supplies they may seem cheaper at first. They can lead to costly mistakes, unreliable data and even safety hazards in the laboratory.
Choosing a supplier is just as important as selecting the right products. A good supplier will provide high-quality lab supplies and offer consistent delivery services. In Kenya you should do some research on suppliers by checking reviews asking for recommendations and verifying their experience in the field.
Good suppliers also provide help after you buy something, warranties and technical guidance, which can be very helpful when dealing with laboratory equipment or sensitive reagents. It is also good to check for their online presence and the socials. This can include checking their Instagram, Tiktok and Facebook.
The budget is always a factor, especially for students, startups or institutions that do not have a lot of money. While it is tempting to go for the option it is important to find a balance between affordability and quality. You should think about the cost, including shipping, maintenance and replacement expenses.
In Kenya comparing prices from suppliers can help you find good deals without compromising on quality. If you invest in supplies, they may cost more at first but they will save you money in the long run.
Before you buy lab supplies think about whether the item are readily available and can be restocked easily whenever you need them. Laboratories need a supply of things like reagents, gloves and glassware. If the supply is not consistent it can disrupt experiments. Delay results. In Kenya some lab supplies that are imported may face delays due to shipping or customs issues so it is wise to work with suppliers who have stock locally or offer reliable restocking timelines.
Another thing to think about is making sure that new lab supplies are compatible with your pre-existing equipment and chemicals. This will enable you get most procedures done and without any interruptions. For example, some reagents may only work with machines or some glassware may not fit your current setups.
If they are not compatible it can lead to inefficiencies, errors or even damage to equipment. You should always check product specifications carefully. If possible, talk to technical experts or suppliers before making a purchase decision.
Laboratory supplies, chemicals and reagents often have specific storage requirements and limited shelf lives, a period which, the chemicals are supposed to stay in order to be considered effective. You should think about whether your lab has the storage equipment such as the refrigerator and the shelves.
In Kenya the climate can damage most chemicals if you do not store things properly it can lead to degradation of materials, which affects the accuracy of results. You should always check expiry dates and storage guidelines to make sure that your supplies remain effective for their intended use.
Safety is something that should never be overlooked when purchasing lab supplies. You should make sure that all materials follow safety standards and come with labeling handling instructions and Material Safety Data Sheets.
In Kenya laboratories must follow health and safety regulations to protect users and the environment.
If you choose supplies that meet these requirements you can minimize risks such as exposure, accidents and environmental contamination.
Some laboratory equipment and supplies require knowledge to use and maintain properly. You should think about whether the supplier offers training, user manuals or technical support. In Kenya having access to technical help can make a big difference, especially for advanced equipment.
If you get training you can use the supplies correctly which improves efficiency and reduces the likelihood of errors or equipment damage.
Purchasing lab supplies in Kenya is not just picking items from a catalog. It requires thought about quality, cost, supplier reliability and safety standards. If you think about these factors, you can make sure that your laboratory operates efficiently gets results and is a safe place to work.
Laboratory supplies in Kenya are very important and one should choose them carefully. The right laboratory supplies, in Kenya can make a difference in the results you get.
The preparation of 1% Eosin Yellow solution is a simple yet crucial lab procedure that is usually involved in biology, histology and staining methods.
Eosin Yellow is a common synthetic dye that is employed in microscopy. It has particular applications in staining of biological tissues where it is frequently used together with Hematoxylin in H&E staining.
It gives the cytoplasm, the connective tissues, and the extracellular matrix a pink or red stain, and thus cell structures become easier to view under a microscope.
This guide will take you through the step-by-step guides that will be taken in order to make the Eosin Yellow stain effectively ensuring consistent results.
A 1% solution typically means:
1 gram of solute (Eosin Y) dissolved in 100 mL of solution (solvent)
This is a volume (w/v) concentration.
Note: In my case, we are going to prepare 100ml of the dye.
The following are required to make the solution:
Step1: Measure the Eosin Y
Step 2: Weigh 1 gram of the Eosin Yellow powder with a digital or analytical balance very carefully.
Step 3: Measure 80 ml of the Ethyl alcohol using the volumetric flask.
Step 4: Add the 1g measured Eosin yellow into the 80ml Ethyl alcohol and then mix gently.
Step 5: Dilute the solution to 100ml using the Ethyl alcohol with the help of a measuring cylinder or volumetric flask.
Note: Not all lab guidelines require Ethyl alcohol; some may require distilled water. There is an advantage of using alcohol (ethanol) in that it enhances solubility and preservation.
Step 6: Filter (Optional) - In case particles are not dissolved filter using the filter paper and funnel to get a clear solution.
Step 7: Transfer the solution to a storage bottle or the amber bottle.
Step 8: Label with adhesive labels and Store
Label the bottle with the following details:
Preparation of 1% Eosin Yellow solution is an easy process that must be precise and should be handled carefully. A reliable staining solution can be made using the above steps to be used in laboratories and at the educational level. Safety and proper storage should always be considered so as to make your solution effective.
We have a visual presentation on this guide, where we take you through a step-by-step procedure on how to prepare the stain. Have a look at it.
A Daniell cell is one of the devices that form the basis of contemporary electrochemistry. This simple set-up demonstrated long before the state-of-the-art batteries of today that chemical reactions could produce a continuous stream of electric current.
The main function of a Daniell cell is to convert the chemical energy into electric energy via spontaneous redox reactions between zinc and copper.
The cell basically converts chemical energy into electric energy. Rather than emitting heat, the Daniell cell absorbs the energy of the reaction and turns it into useful electric current.
This is achieved by the arrangement of two dissimilar metals, typically zinc and copper usually placed in separate solutions. Their external connection is through a wire, and the internal connection is through a salt bridge that allows ions to move and maintain the electrical neutrality.
The core of the process consists of a redox reaction: the electrons are lost by zinc (oxidation) and are gained by copper ions (reduction). The passing of the electrons in the external circuit produces electricity. Below is the reaction equation that occurs when the reaction of the two takes place.
Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s)
This easy reaction demonstrates a strong concept: it is possible to generate electricity indefinitely by regulated chemical transformations.
In the reaction above, zinc is taken as the anode (oxidation site) and copper as the cathode (reduction site). The salt bridge is the double vertical line which completes the circuit as it gets the ions to move in either solution.
In chemistry, the cell is represented as a standard notation that shows the flow of electrons and the components involved. Below is the diagram of the Daniell cell.
Daniell cell basically represents a viable illustration of a galvanic cell. The cell is classified under the category of galvanic cells that create electricity through spontaneous chemical reactions. The word ‘galvanic’ is derived after Luigi Galvani, the first to find out the connection between electricity and chemistry.
Although the two terms may be interchanged when discussing a simple system, the Daniell cell is the one with electrodes of zinc and copper.
No, the Daniell cell and a dry cell are different in structure and usage although both are producing electricity. Daniel cell is a cell which makes use of liquid electrolyte while a dry cell is a kind that uses an electrolyte in a paste form. It is usually sealed within a small body hence the use in flashlights and in remote controls.
The most important difference is that of practicality. Daniell cell is good in instructing scientific principles whereas the dry cells are designed to be convenient and portable.
Yet its importance remains. It remains an essential staple of laboratory teaching and is very common as a demonstration of the principles of electrochemistry.
Actually, a lot of contemporary batteries are founded on the same basic concept, the Daniell cell, which was being controlled redox reaction to generate an electron flow.
The cell is still useful and has remained to be the most useful interventions done in chemistry. Therefore, even though you might not be using a Daniell cell in your everyday life, the idea behind it underlies a lot of the technology you use in your day-to-day activities.
We have it in stock and we can’t wait to receive your order.
Methyl orange is an indicator commonly used in chemistry laboratories to determine whether the solution is acidic or basic. It particularly comes in handy in titrations to establish endpoint of reactions between strong acids and weak bases. Preparation of a 0.1% Methyl orange solution is relatively easy but requires proper weighing mixing.
This guide will take you through the step-by-step preparation of a 0.1% Methyl Orange pH indicator, the materials needed and the possible purity adjustments required to achieve a good pH indicator.
Methyl orange is an organic pigment that is used as a pH detector and the color of the pigment depends on the acidity or alkalinity of a given solution.
The pH indicator changes color depending on the pH of the solution.
|
pH Range |
Color Change |
|
Below 3.1 |
Red |
|
3.1 – 4.4 |
Orange |
|
Above 4.4 |
Yellow |
Examples:
When the pH Indicator is added to the Hydrochloric acid (Strong acid) – the solution turns red. In neutral solution like water appears orange/yellow while in basic solution like Sodium hydroxide the solution becomes yellow.
A 0.1% (w/v) solution means:
0.1 g of solute dissolved in 100 ml of solvent.
In my case, I’m going to prepare 100ml of the solution. Therefore, to prepare 100 ml of 0.1% methyl orange solution:
But our dye is 85% pure. In this case we will need to adjust for purity.
Since purity is 85% Let’s find the mass of the powder needed
Weight required = Required pure dye/ Purity
Where purity = 85% = 0.85g of the powder
0.85x = 0.1g
X= 0.1/0.85 = 0.118g
Therefore, you need 0.118g of the Methyl Orange powder to perform the procedure.
Preparation of the Methyl Orange is important in the lab as the indicator is used in many areas to define the acidity or the alkalinity of a solution. When added to certain solutions, the indicator changes the colour of the suggesting a certain Ph.
It is essential to be careful when preparing the indicator in order to achieve the best final outcome when doing the tests in the laboratory. We have a tutorial on how to prepare the Methyl Orange pH Indicator in the laboratory and understand the correct procedure. Watch the tutorial now to learn the full preparation process step by step!
Iodine is one of the reagents used in Gram staining, a method that is among the most widely used in microbiological techniques of differentiating bacteria into Gram-positive and Gram-negative.
When staining microorganisms under a microscope, proper preparation of iodine solution in the laboratory is important in order to achieve the right results.
This guide will take you through the essential steps on how to prepare Gram’s iodine digging deep on the materials needed, calculations and also the preparation process.
Gram iodine is a solution that consists of a mixture of the iodine crystals and potassium iodide that is dissolved in the distilled water at regulated amounts. The iodine dissolves well in water with the aid of the potassium iodide.
During gram staining, the stain is used as a mordant, which is used to fix the primary stain within bacterial cells. The procedure uses Crystal violet as the primary stain in the complex with iodine. This crystal violet-iodine complex gets entangled in the Gram-positive bacteria and it enables them to maintain the purple stain in the staining procedure.
The following laboratory materials will be required to prepare iodine solution to be used during the process of Gram staining:
NB: In our case, were going to prepare 1% Grams Iodine solution, 100 ml of the stain. That means dissolving 1g of pure iodine in 100 ml of the distilled water. Potassium iodide in this case is measured twice the amount of the Iodine used while still in the preparation of the stain.
It is also advisable to crush the iodine crystals to increase the surface area at which the crystals will dissolve completely.
For 100 ml solution:
Iodine = 1 g
Potassium iodide = 2 g
Distilled water = 100 ml
Let’s say you want to prepare 1 L:
To prepare 1 liter, then just multiply the quantities by 10:
Iodine = 10 g
Potassium iodide = 20 g
Distilled water = 1000 ml
· Name: Iodine Solution
· Concentration: 1%
· Date of preparation
· Prepared by: Include the date of preparation
Iodine preparation in the laboratory requires precise measurements of the iodine crystals, distilled water and the Potassium iodide. The crushing of the iodine is important as the crystals are quite stubborn in dissolving in water. Potassium iodide also plays a role dissolving the iodine crystals too.
Therefore, understanding these steps above is key in preparing a good stain for gram stain. We have a tutorial on what is gram stain and also on how to prepare the iodine solution. Watch the video to get a better understanding on the topic.
Safranin is a common biological stain within microbiology laboratories, particularly in staining, e.g. Gram staining and endospore staining. It is usually a counterstain that stains cells either pink or red, enabling laboratory technicians and scientists to differentiate between types of bacteria with the help of a microscope.
When you are in a microbiology lab, it is well-known that to make right microscopic observations and good results, it is essential to know how to prepare safranin stain correctly.
This manual describes how to prepare safranin stain in the lab, formula, calculations, materials and preparation process.
Safranin is a simple stain, which attaches to the negatively charged bacteria cell components. It is mostly applied as an antstain in Gram staining where it turns Gram-negative bacteria pink/red following the decolorization process.
Safranin has common uses which include:
The concentration of Safranin is standardized. 0.5% Safranin solution is typically made in the majority of microbiology laboratories. This means: 0.5 g Safranin in 100 mL solvent. The distilled water is normally used as the solvent.
In some cases, or protocols, a 0.1% Safranin concentration can be used. The dye content of the dye can range between 84% to 100%.
The laboratory preparation of safranin stain will require:
1. Safranin powder (Dye content of 100%)
7. Filter paper
8. Funnel
9. Amber storage bottle
In my case, I will be preparing 100ml of Safranin.
For 100 mL of Safranin Solution, 0.1% solution means: 0.1 Safranin in 100ml solvent
So, you need:
· 0.1 g Safranin powder
· 100 ml of the distilled water.
Step 1: Weigh Safranin Powder.
Weigh with an analytical balance: 0.1 grams of Safranin powder.
NB: Precision is essential to guarantee that there is staining strength.
Step 2: Dissolve the Safranin
Add around 70 mL of distilled water into a conical flask then add the safranin powder (weighed).
Stir thoroughly with a glass rod till the powder dissolves.
Note: The use of ethanol facilitates dissolution of the dye, as well as enhances stain penetration.
Step 3: Make Up the Final Volume(100ml)
Continue adding the distilled water until the solvent reaches a total volume of 100 ml.
Mix thoroughly.
Step 4: Filter the Solution
Use filter papers and funnel to filter the solution to eliminate any particles that do not dissolve.
Step 5: Store the Stain in amber bottles
Then, label the bottle(s) with:
· Name: Safranin stain
· Concentration: 0.1%
· Date of preparation
· Prepared by
Our procedural tutorial on the preparation of the safranin stain in the laboratory has a step by step guide in each of the steps. Watch and learn more about how the stain is prepared.
Safranin is the last counter stain during gram staining. It is important to note that the stain is easily contaminated and therefore you need to measure accurately in order to achieve the best results. For long term use the prepared stain can be stored in amber bottles for later use and should be labelled well.
One of the most important solutions that are utilised in hospitals, microbiology laboratories, research and clinical settings is normal saline solution.
Accuracy and sterility are very important whether you are preparing bacterial suspensions, serial dilutions or using it in the medical field.
As a microbiology student, or work professional in the lab, learning how to master this procedure is a guarantee of reliable and reproducible results.
A Normal saline solution is a solution that contains dissolved solvents at a percentage usually 0.9 per cent (w/v) Sodium chloride.
The term 0.9% weight/volume means:
A sodium chloride solution was made by dissolving 0.9 grams of the salt in sufficient water to obtain 100 mL of solution, mostly distilled water.
The reason being that it is isotonic to human blood plasma, in other words, it has the same osmotic pressure as body fluids hence the name normal. This helps to avoid the shrinking (crenation) or bursting (hemolysis) of cells.
Normal Saline Formula and Calculations:
Standard Formula is usually: Mass of NaCl (g) = 0.9/100 x Final Volume (mL)
NB: In this procedure I’m going to prepare 100 ml of Normal saline solution.
Step 1: Accurately weigh Sodium Chloride.
Weigh the necessary quantity of NaCl (in my case: 9 grams of the NaCl) using an analytical balance.
Specificity is relevant as the minor mistakes can influence the isotonicity.
Step 2: Measure 100ml of the Distilled water.
Using a volumetric flask, measure 100ml of the distilled water.
Step 3: Dissolve in NaCl with the Distilled Water.
Place the distilled water into a conical flask. Then proceed adding the measured {9 grams} of the NaCl into it.
Step 4: Mix the solution
Mix Gentle until all the Sodium Chloride dissolves into the distilled water. After every crystal has dissolved, transfer the solution into a separate bottle that is sterile. The solution is now ready to be used in the laboratory.
We have a tutorial guide on how to prepare the solution. Watch the video to improve your laboratory skills.
A simple but a necessary laboratory skill is preparation of normal saline solution (0.9% NaCl). The calculation may seem that difficult but measuring, necessary dissolution, adjusting of the volume and sterilisation are the factors between a good solution and a bad one.
Methylene blue is one of the most frequently used dyes in microbiology, chemistry, and medical laboratories. It is commonly applied in the staining of cells, detection of microorganisms and a number of biochemical experiments.
Due to its significance in lab activity, the ability to prepare a Methylene blue solution appropriately is a crucial for accurate results.
This guide will go through on how to prepare methylene blue solution in the laboratory, materials needed and calculations to be made.
Methylene blue is an artificial dye that is a member of phenothiazine family. Physically, it looks like a dark green crystalline powder yet when it is dissolved in water, it turns a deep blue. Quite a surprise!
The following are the uses of Methylene blue:
NB: In my case I’m going to prepare 100ml of the methylene blue solution using a dye content of 96%.
1g of pure solute in 100ml of the solution is usually 1% pure. Since my dye content is 96% pure, I will have to adjust for the purity.
But first, let’s find the grams of the powered in the Methylene Blue.
If 1g = 100%
Y? = 96%
96% x 1g/100 = 0.96g
1g powder contains 0.96g pure Methylene Blue
X? = 1g of Methylene Blue Powder
0.96X = 1g
X = 1/0.96 = 1.04g
N/B: One of the most common concentrations used in microbiology laboratories is the 1% methylene blue solution.
In our case, we will be going to make 100ml of the Methylene blue solution.
Procedure will be: Weigh and dissolve 1.04g of the Methylene blue in 75ml of the distilled water and then dilute it to 100ml. Filter the solution to remove the undissolved particles. Finally label and store the stain in reagent bottles. Include the following details on the label:
We have a tutorial on how to prepare Methylene blue solution in the laboratory. Watch the tutorial to have a better visual understanding of the same.
Preparing a methylene blue solution in the laboratory is an essential laboratory practices that require being precise. This starts when doing the weighing of Methylene blue and the distilled water. Adjusting the amount of your dye content is necessary too.
Therefore, understanding how to prepare the stain is an important skill for students, researchers and lab techs. Filtering can also be done to make the stain more accurate.
Ethanol is widely used in laboratories to perform various disinfection procedures and to maintain a clean, contamination-free working environment. During experiments and routine laboratory work, maintaining sterility is essential to prevent unwanted microorganisms from interfering with results.
At the correct concentration, ethanol is highly effective for disinfecting laboratory benches, equipment, and even hands during experimental procedures. In particular, 70% ethanol is commonly used to clean work surfaces and as a hand disinfectant because it effectively eliminates bacteria, fungi, and many viruses.
Research shows that 70 % Ethanol is effective in killing bacteria, viruses and also fungi because the amount of water present in the concentration allows slow evaporation and improves protein denaturation.
N/B: The preparation of 70% ethanol depends on the concentration of your stock solution. For example, if you are working with a 90% or 95% ethanol stock solution, the dilution calculation will differ.
In this example, we will prepare 100 mL of 70% ethanol using a 95% ethanol stock solution, demonstrating the correct calculation and dilution method.
5. Labels
C1V1=C2V2
Where:
C1 = Initial Concentration
V1 = Volume of ethanol needed
C2 = Final Concentration (70%)
V2 = Final Total Volume
Example on the calculation:
V1=C2xV2/C1
V1=70x100/95
V1= 73.7 ml – Volume of Ethanol needed
Your solutions will be ready to use.
Our tutorial on how to make 70% Ethanol solution in the laboratory has a step by step compressive guide on the topic. Click the link to watch.
Ethanol preparation in the lab is easy and direct when you understand the dilution formula and follow proper laboratory procedures. A low concentration of the solution is more effective than a higher one.
Remember doing regular disinfection in the laboratory is essential in maintain a clean environment, that’s why ethanol is needed.
All laboratory work is carried out on the basis of accurate measurement. Regardless of whether experiments occur in a school laboratory, medical institution, research institution, or even an industrial environment, measuring instruments will ensure precise, repeatable and scientifically valid results.
Appropriate measurement tools are essential in getting accurate information from procedures and experiments.
In this guide we will describes ten common measuring equipment used in the laboratory. The guide concentrates on the role, common use and significance of each instrument, but maintains the explanation simple and comprehensible as opposed to being too list-like.
A measuring cylinder is specially used to measure the liquid volumes more accurately than the usual containers, such as beakers. It has a tall and narrow shape which minimizes mistakes in the reading process and enables you to view the status of liquid at eye level.
Measurement of cylinders are used in laboratories in the preparation of solutions, diluting chemicals or transferring liquids between two containers. They are suited to the common metric where one needs only a reasonable standard of accuracy, and are frequently used in chemistry and biology laboratories.
Beakers are one of the most common laboratory equipments. They are not used in precise measurements but mostly in handling liquids. Beakers are extensively applied in mixing, heating, dissolution of substances and storage of samples during experiments.
They are durable and easy to use and therefore, can be used in daily laboratory activities in which precision is not a major concern.
Pipettes are measuring tools which are used to transfer small amounts of liquid precisely in the lab in various procedures. They are necessary in case the results can be greatly influenced by the tiniest measurement mistakes.
Pipettes are used in biology, chemistry and medical labs, to manipulate reagents, biological samples and test solutions. Micropipettes are particularly essential in contemporary laboratories that work with enzymes, DNA samples and pharmaceuticals.
There are many pipette and accessories in our store including, dropper (Pasteur pipette, pipette fillers, pipette bulb and the pasteur pipette.
A burette is a very precise measurement tool that is primarily used in titration experiments. It permits regulated discharge of fluid, usually drop by drop, which allows the estimation of accurate quantities of fluid in a chemical reaction.
Owing to its accuracy burettes are often utilised in analytical chemistry to ascertain unknown concentrations and learn how reactions behave under controlled circumstances.
Balances in the laboratory determine the mass highly accurately. Laboratories can also employ electronic balances on routine work or an extremely sensitive measurement, which makes them use analytical balances.
Mass measurement is important when preparing chemical solutions, performing a quantitative experiment, or quality control in an industrial and pharmaceutical laboratory.
There are two types of balances in the laboratory all available in our store. They include spring balances and the electronic balances.
Numerous laboratory experiments have temperature effects on their rate, efficiency, and the outcome of the experiments.
Thermometers are devices that are used to measure and monitor changes in temperature of reactions, heating, cooling or storage. Digital thermometers have become the norm because they are fast and accurate but still glass thermometers are still used in most education and research labs.
We have different types of thermometer in our store which include the gun thermometer, digital food thermometer, infrared thermometers, and digital thermometers.
Measurement of time has been fundamental in most experiments, particularly those involving reaction rates, motion or biological processes.
Time intervals are measured using a stopwatch. In the laboratory, time can be precise to provide consistency, enable the comparisons between results and enhance the reliability of the data collected during the experiments.
Volumetric flasks are constructed to be capable of holding a single volume of liquid and a calibration line is marked on the neck of the flask.
This is much more precise than beakers or measuring cylinders used to prepare solutions. They are very popular in preparing standard solutions, dilutions or reagents with very specific concentrations, especially in analytical and industrial laboratories.
This a simple though necessary measurements devices used in the laboratory and particularly in experiments that involve the length, distance, or growth are rulers and meter rules.
A meter rule is usually applied in experiments in physics and biology, and laboratory configurations where spatial quantities are needed.
The pH meter is used to measure the acidity or alkalinity of a solution with great accuracy. A pH meter gives specific numbers unlike pH paper which is used to approximate a pH.
The tool is required in the chemical analysis, environmental tests, water quality, and in biological tests wherein the level of pH directly affects the reaction and behaviour of organisms.
Laboratory measuring instruments are important in the accuracy, safety, and consistency of certain procedure.
With these measurement individuals are able to repeat experiments, confirm findings, and draw conclusions. The appropriate tool to use in every task also lowers errors and enhances efficiency in the laboratory work.
Most scientific experimentation is based on these ten common measuring instruments. Since the measurements of liquids and mass, time, and acidity are considered, the instruments are used with a certain purpose that will lead to the correct and valid results.
All the measuring instruments discussed above are available in our store. Simply click the links above to place your order or view the product.
One of the most basic methods of laboratory science is staining. In absence of stains, much of microscopic structures could not be seen and thus diagnosis, research and teaching could not have been possible.
Stain reagents enable laboratory professionals to view the objects of interest that the naked eye cannot reveal by coloring bacteria, blood parasites, tissue structures, and cellular components.
Stain reagents are used in the daily routine in clinical, educational and research laboratories in Kenya. Knowing the function of every reagent not only its name but also the knowledge is key in getting correct outcomes, avoid mistakes, and enhance the overall quality of the laboratory.
Most cells, bacteria and tissues are usually transparent and microscopic biological specimens that we find hard to spot using our naked eyes. Specific stain reagents are bound to various cellular components that include cell walls, nuclei, cytoplasm, or enzymes and provide contrast when viewed under the microscope.
This technique is important as it enables laboratory workers to recognize microorganisms, morphology, cell variety, and abnormalities.
The color is not all, staining is chemistry. A stain can be successful based on the quality of the reagents used, the correct preparation, proper timing and storage conditions.
Crystal violet is a famous primary stain in microbiology, particularly on Gram staining. It enters the bacterial walls and stains all the bacteria purple during the first phase of the process. It plays a very important role as it lays the basis of the differentiation of Gram-positive and Gram-negative organisms.
Crystal violet should be made at the right concentration in teaching and diagnostic laboratories. Excessive concentration may result in background staining whereas a low concentration may result in poor results.
The Gram's iodine is used as a mordant, trapped the crystal violet stain within the bacterial cell wall. It creates a stable crystal violet iodine complex which is held by Gram-positive bacteria in decolorization.
In the absence of iodine, the Gram stain would not have worked. This reagent indicates the significance of sequencing in staining methods- each reagent is very specific and cannot be replaced.
In most staining processes, decolorization is the most sensitive process. The alcohol or acetone-alcohol selectively removes the stain on Gram-negative bacteria and leaves the Gram-positive bacteria stained.
The decolorization timing depends on time. Over-decoloration may result in false Gram-negative or under-decoloration may result in Gram-positive bacteria appearing Gram-negative. This reagent requires a skilled management process to make proper diagnosis.
Gram Safranin is a typical counter staining. Upon decolorization it will turn Gram-negative bacteria pink or red, which allows them to be seen distinctly on the purple gram-positive cells.
Another application of safranin is in histology and staining of plant tissues, and this makes it a universal reagent in most laboratories.
Giemsa stain cannot be absent in hematology and parasitology. It is also commonly applied in staining blood films to identify malaria parasites, trypanosomes and other organisms of the blood.
It is also used to distinguish the white blood cells according to their nuclear and cytoplasmic characteristics. The quality of Giemsa stain is determined largely by the pH of the buffer which is typically kept at 6.8. Wrong PH causes low differentiation of colors and erroneous analysis.
We have a guide on how to make 1 in 10 Giemsa stain solution. Spare some minutes to looks at it.
Methylene blue is a basic stain that is simple but powerful and is employed in fast analysis of cells and bacteria. It can be used in the laboratories of teaching and in the initial screening of microscopes.
Since it is a stain that exhibits a strong stain on nuclei and acidic components, it is applied in the identification of cell structure and bacterial morphology in a limited period of time.
Carbol fuchsin is one of the essential reagents used in the acid-fast staining, especially in Mycobacterium tuberculosis. It enters the waxy bacterial cell walls that are not easily stained.
This reagent is essential in the diagnosis of tuberculosis in clinical laboratories. To achieve proper penetration, proper heating or long staining time is needed.
The decolorizer in acid-fast staining is acid-alcohol. It eliminates carbol fuchsin in non-acid-fast organisms and leaves the red stain in the acid-fast bacteria. The right amount is vital because excessive acid-alcohol may remove stain off the genuine acid-fast.
The spore staining is primarily done by Malachite green. It provides a green stain to bacterial spores and a safranin stain to the vegetative cells. In the teaching laboratory this reagent is particularly handy in illustrating the survival processes of bacteria in adverse conditions.
Stain reagents are chemically sensitive to many factors. Their activity can be compromised by exposure to light, heat, contamination, or inappropriate dilution.
The stains are supposed to be in labeled containers with tight lids and stored preferably in cool and dark regions in laboratories. Consistency is achieved by doing regular quality checks like staining control slides to identify problems at an early stage.
Microscopic analysis of laboratories depends on stain reagents. The roles of each of the reagents are defined and they manage to ensure contrast of some cellular features. High-quality staining reagents and training of the laboratory staff to use them properly will guarantee the reliability of the results and guarantee the high quality of laboratory practice in years to come.
Looking to restock your lab? You’ll find all these reagents available in our store, just click the links above to order. We appreciate your trust and are always glad to support your laboratory needs.
